TIKA-4583: Add PF4J plugin.properties and Plugin class

- Created IgniteConfigStorePlugin extending org.pf4j.Plugin
- Added plugin.properties with plugin metadata
- Added pf4j dependency to pom.xml
- Plugin now properly discoverable by PF4J plugin manager

Plugin metadata:
- plugin.id: tika-ignite-config-store-plugin
- plugin.class: org.apache.tika.pipes.plugin.ignite.IgniteConfigStorePlugin
- plugin.version: 4.0.0-SNAPSHOT
- plugin.provider: Apache Tika

This enables proper plugin discovery and lifecycle management
through the PF4J framework, consistent with other Tika plugins.

Author: nddipiazza

tika-pipes/tika-ignite-config-store/pom.xml

@@ -46,6 +46,10 @@
       <artifactId>tika-plugins-core</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.pf4j</groupId>
+      <artifactId>pf4j</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.ignite</groupId>
       <artifactId>ignite-core</artifactId>

tika-pipes/tika-ignite-config-store/src/main/java/org/apache/tika/pipes/plugin/ignite/IgniteConfigStorePlugin.java

@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.tika.pipes.plugin.ignite;
+
+import org.pf4j.Plugin;
+import org.pf4j.PluginWrapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * PF4J Plugin class for Apache Ignite ConfigStore.
+ */
+public class IgniteConfigStorePlugin extends Plugin {
+    
+    private static final Logger LOG = LoggerFactory.getLogger(IgniteConfigStorePlugin.class);
+
+    public IgniteConfigStorePlugin(PluginWrapper wrapper) {
+        super(wrapper);
+    }
+
+    @Override
+    public void start() {
+        LOG.info("Starting Ignite ConfigStore plugin");
+        super.start();
+    }
+
+    @Override
+    public void stop() {
+        LOG.info("Stopping Ignite ConfigStore plugin");
+        super.stop();
+    }
+
+    @Override
+    public void delete() {
+        LOG.info("Deleting Ignite ConfigStore plugin");
+        super.delete();
+    }
+}

tika-pipes/tika-ignite-config-store/src/main/resources/plugin.properties

@@ -0,0 +1,21 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+plugin.id=tika-ignite-config-store-plugin
+plugin.class=org.apache.tika.pipes.plugin.ignite.IgniteConfigStorePlugin
+plugin.version=4.0.0-SNAPSHOT
+plugin.provider=Apache Tika
+plugin.description=Apache Ignite ConfigStore for distributed configuration storage